The Use of EIectrochemistry and Ellipsometry for Identifying and Evaluating Corrosion on Aircraft.
Abstract
Electrochemical corrosion testing using AC impedance measurement and ellipsometry has been performed on aircraft aluminum 2024-T3 samples. The AC Impedance technique was used to acquire a precise low-frequency impedance signature of corroding painted aircraft aluminum which will be used to develop a simple, yet powerful, sensor for the early detection and measurement of corrosion processes on aircraft. The use of ellipsometry and DC electrochemical techniques, have verified that the low-frequency impedance spectrum obtained from the AC Impedance technique is representative of the corrosion process for painted aircraft aluminum 2024-T3. Based on these findings, several versions of prototype electrode sensors were developed capable of obtaining this signature utilizing a two-electrode approach. These in-situ electrode sensors were extensively tested using AC Impedance, electrochemistry, ellipsometry, and X-ray Photoelectron Spectroscopy. Results indicate the ability of the electrode sensors to non-destructively monitor the corrosion process on aircraft aluminum 2024-T3 and to withstand harsh operating environments. (jg) p.2
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 1994
- Accession Number
- ADA290249
Entities
People
- Brian C. Taggart
- Charles R. Anderson
- Chester M. Dacres
- Pam Whisnant